Discharge criteria from inpatient care infants <6 months

In the WHO guidelines for the "Updates on the Management of SAM in Infants and Children" one of the criteria for discharge for infants <6 months from inpatient to outpatient care is listed as (page 64-65, section 8.5):

"c. weight gain on either exclusive breastfeeding or replacement feeding is satisfactory, e.g.above the median of the WHO growth velocity standards or more than 5 g/kg/day for at least 3 successive days"

We are questioning this recommendation of only 5g/kg/day as adequate weight gain before discharge. Adequate weight gain in the WHO document "Managing newborn problems: a guide for doctors, nurses, and midwives" is defined as 15 g/kg/day.

Does anyone know where the 5 g/kg/day recommendation comes from? What are you using in your facilities? Could this just be a typo?

Thanks for your help.